School of Stomatology, Lanzhou University, Lanzhou 730030, China.
School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730030, China.
Sensors (Basel). 2023 Jun 5;23(11):5336. doi: 10.3390/s23115336.
Compared to fixed orthodontic appliances with brackets, thermoplastic invisible orthodontic aligners offer several advantages, such as high aesthetic performance, good comfort, and convenient oral health maintenance, and are widely used in orthodontic fields. However, prolonged use of thermoplastic invisible aligners may lead to demineralization and even caries in most patients' teeth, as they enclose the tooth surface for an extended period. To address this issue, we have created PETG composites that contain piezoelectric barium titanate nanoparticles (BaTiONPs) to obtain antibacterial properties. First, we prepared piezoelectric composites by incorporating varying amounts of BaTiONPs into PETG matrix material. The composites were then characterized using techniques such as SEM, XRD, and Raman spectroscopy, which confirmed the successful synthesis of the composites. We cultivated biofilms of () on the surface of the nanocomposites under both polarized and unpolarized conditions. We then activated piezoelectric charges by subjecting the nanocomposites to 10 Hz cyclic mechanical vibration. The interactions between the biofilms and materials were evaluated by measuring the biofilm biomass. The addition of piezoelectric nanoparticles had a noticeable antibacterial effect on both the unpolarized and polarized conditions. Under polarized conditions, nanocomposites demonstrated a greater antibacterial effect than under unpolarized conditions. Additionally, as the concentration of BaTiONPs increased, the antibacterial rate also increased, with the surface antibacterial rate reaching 67.39% (30 wt% BaTiONPs). These findings have the potential for application in wearable, invisible appliances to improve clinical services and reduce the need for cleaning methods.
与带托槽的固定正畸设备相比，热塑性隐形正畸矫治器具有美观性能高、舒适性好、口腔健康维护方便等优点，在正畸领域得到了广泛应用。然而，热塑性隐形矫治器的长期使用可能会导致大多数患者的牙齿脱矿甚至龋齿，因为它们会长时间封闭牙面。为了解决这个问题，我们已经开发出了含有压电钛酸钡纳米粒子（BaTiONPs）的 PETG 复合材料，以获得抗菌性能。首先，我们通过将不同量的 BaTiONPs 掺入 PETG 基体材料中，制备了压电复合材料。然后，我们使用 SEM、XRD 和 Raman 光谱等技术对复合材料进行了表征，证实了复合材料的成功合成。我们在极化和非极化条件下在纳米复合材料表面培养了 () 生物膜。然后，我们通过对纳米复合材料施加 10 Hz 循环机械振动来激活压电电荷。通过测量生物膜生物量来评估生物膜和材料之间的相互作用。压电纳米粒子的添加对极化和非极化条件都有明显的抗菌作用。在极化条件下，纳米复合材料比非极化条件下表现出更强的抗菌效果。此外，随着 BaTiONPs 浓度的增加，抗菌率也随之增加，表面抗菌率达到 67.39%（30wt% BaTiONPs）。这些发现有可能应用于可穿戴、隐形设备中，以改善临床服务并减少对清洁方法的需求。
